JP4204874B2 - Image display device, image display method of image display device, program, and recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image display system that displays a virtual object located in a three-dimensional virtual space constructed in a computer or the like.
[0002]
[Prior art]
Conventionally, as an image display system for displaying a virtual object located in a three-dimensional virtual space constructed in a computer or the like, a first scroll bar for expanding and contracting the virtual object in the vertical direction of a screen for displaying an image, and a virtual object Use the mouse to operate the second scroll bar to enlarge or reduce, and the cursor that can move in the direction parallel to the screen and rotate the viewpoint coordinates using the coordinates of the origin of the three-dimensional virtual space as the coordinates of the center point Thus, there has been provided an image display system capable of displaying a virtual object positioned in the virtual space in a multifaceted manner (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Unexamined Patent Publication No. 2000-010663 (page 3, FIG. 2)
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional image display system, when the focused virtual object is separated from the origin coordinates of the three-dimensional virtual space, the focused virtual object is out of the display range of the screen due to the rotational movement of the viewpoint coordinates. There is a problem that an image intended by the user is not displayed.
[0005]
SUMMARY An advantage of some aspects of the invention is that it provides an image display system capable of displaying an image intended by a user.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, the image display device of the present invention includes a designated coordinate storage unit that stores, as a designated point, a midpoint of a perpendicular line drawn from the vertex of the virtual object to the bottom surface, and the midpoint from the coordinates of the viewpoint. A calculation coordinate storage means for storing a point at which the line of sight that passes through the plane intersects as a calculation point, and any one of the specified point or the coordinates of the calculation point stored by the specified coordinate storage means or the calculation coordinate storage means Selection means for selecting as point coordinates, rotation amount input means for inputting the rotation amount in the rotational movement of the coordinates of the viewpoint around the coordinates of the rotation center point selected by the selection means, and selected by the selection means The new viewpoint coordinates are calculated from the coordinates of the rotation center point and the rotation amount input by the rotation amount input means, and the rotation center point is used as the gaze point coordinate. Image generating means for generating an image projected on a projection plane orthogonal to a straight line from the coordinates of the desired viewpoint to the coordinates of the gazing point, and display means for displaying the image generated by the image generating means It is characterized by.
[0007]
Further, the image display method of the image display device of the present invention includes a designated coordinate storage means for storing a midpoint of a perpendicular line from the vertex of the virtual object to the bottom surface as a designated point, and a line of sight passing through the midpoint from the coordinates of the viewpoint. An image display method for an image display device, comprising: calculated coordinate storage means for storing a point intersecting the plane as a calculated point; and display means for displaying an image, wherein the designated coordinate storage means or the calculated coordinate storage means The step of selecting either the stored coordinates of the specified point or the calculated point as the coordinates of the rotation center point, and the rotation amount in the rotational movement of the coordinates of the viewpoint centered on the coordinates of the selected rotation center point A step of calculating a new viewpoint coordinate from the coordinates of the selected rotation center point and the input rotation amount, and using the rotation center point as a gaze point coordinate, Characterized by the steps of generating an image projected on the projection surface perpendicular from the coordinates in a straight line toward the coordinates of the infusion viewpoint, and displaying the generated image on the display unit, the execution.
[0008]
The program of the present invention causes a computer to execute each step in the image display method of the image display device.
[0009]
The recording medium of the present invention is characterized by being readable by a computer on which the program is recorded.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
(First embodiment)
First, the configuration of the image display system according to the first embodiment will be described.
[0020]
As shown in FIG. 1, the image display system 100 according to the present embodiment is a coordinate designating unit 101 that designates the coordinates of an arbitrary point as the center point when rotating the coordinates of the viewpoint, that is, the coordinates of the rotation center point. The designated coordinate storage means 102 for storing the point designated by the coordinate designation means 101, that is, the coordinates of the designated point, and the three independent directions extending from the origin 201 as shown in FIG. In the virtual space 200 with the axis 203 and the z axis 204, the coordinates of the point 211 where the line of sight 210 extending from the viewpoint 205 passing through the midpoint 209 of the z axis from the base 207 to the vertex 208 of the virtual object 206 intersects the xy plane are rotated. A coordinate calculation unit 103 that calculates the coordinates of the center point, and a calculated coordinate storage unit that stores the points calculated by the coordinate calculation unit 103, that is, the coordinates of the calculation point And a 104. The image display system 100 also selects a selection unit 105 that selects one of the coordinates of the designated point and the coordinates of the calculated point respectively stored in the designated coordinate storage unit 102 or the calculated coordinate storage unit 104 as the coordinate of the rotation center point. The rotation amount input means 106 for inputting the rotation amount in the rotational movement of the coordinates of the viewpoint centered on the coordinates of the rotation center point selected by the selection means 105, and the coordinates of the rotation center point selected by the selection means 105. An image generation unit 107 that generates an image projected on a projection plane that is orthogonal to the line of sight directed from the coordinates of the new viewpoint after the rotational movement to the coordinates of the point of interest, and the image generated by the image generation unit 107 Display means 109 for displaying.
[0021]
The CPU 108 is provided with the coordinate calculation means 103 and the image generation means 107 described above.
[0022]
Next, the operation of the image display system 100 will be described based on the flowchart of FIG. 3 showing the operation of the image display system 100 according to the present embodiment.
[0023]
First, as shown in FIG. 2, the coordinates of the calculation point 211 are calculated by the coordinate calculation means 103 (S301), and the calculated coordinates of the calculation point 211 are stored by the calculation coordinate storage means 104 (S302).
[0024]
Next, as shown in FIG. 4 representing the same virtual space 200 and virtual object 206 as in FIG. 2, the coordinate of the middle point 209 of the z axis from the base 207 to the vertex 208 of the virtual object 206 is designated by the coordinate designating means 101. The coordinates of the designated designated point 409 are stored by the designated coordinate storage means 102 (S304).
[0025]
Next, either one of the coordinates of the designated point 409 or the coordinates of the calculated point 211 is selected as the coordinates of the rotation center point by the selection means 105 in accordance with an instruction from the user (S305).
[0026]
Subsequently, when the coordinates of the designated point are selected as the coordinates of the rotation center point in step S305, the coordinates of the designated point are read by the selecting means 105 from the designated coordinate storage means 102 (S306), and the designated points read are read. Are output to the image generation means 107.
[0027]
When the coordinates of the calculation point are selected as the coordinates of the rotation center point in step S305, the coordinates of the calculation point are read from the calculation coordinate storage unit 104 by the selection unit 105 (S307), and the calculated calculation point coordinates are read. The coordinates are output to the image generation means 107.
[0028]
Next, rotation amounts in the x-axis direction, y-axis direction, and z-axis direction are input to the image generation unit 107 by the rotation amount input unit 106 (S308).
[0029]
Next, the coordinates of the new viewpoint are calculated by the image generation means 107 from the coordinates of the rotation center point and the rotation amount input to the image generation means 107 (S309).
[0030]
Subsequently, the coordinates of the rotation center point selected in step S305 are regarded as the coordinates of the gazing point by the image generation means 107, and the projection plane orthogonal to the straight line from the viewpoint coordinates calculated in step S309 to the gazing point coordinates. The image projected on the screen is generated by the image generation means 107 (S310).
[0031]
Next, the image generated in step S310 is output from the image generation means 107 to the display means 109, and the output image is displayed by the display means 109 (S311).
[0032]
Here, as shown in FIG. 5A, in order to form an image parallel to the xz plane of the virtual object 206, the coordinate of the calculation point 211 is read by the selection unit 105 as the coordinate of the rotation center point in step S307. In step S308, when a predetermined amount of rotation is input to the image generation unit 107 by the rotation amount input unit 106 in the x-axis, y-axis, and z-axis directions so that the projection plane 512 is parallel to the xz plane, The virtual object 206 is projected only on the upper half of the projection surface 512, and an image in which the upper part of the virtual object 206 exceeds the screen range as shown in FIG. End up.
[0033]
In contrast to this, as shown in FIG. 6A, in step S306, the coordinates of the designated point 409 are read by the selection means 105 as the coordinates of the rotation center point, and an image parallel to the xz plane of the virtual object 206 is formed. In step S308, a predetermined amount of rotation is input to the image forming unit 107 by the rotation amount input unit 106 in the x-axis, y-axis, and z-axis directions so that the projection plane 612 is parallel to the xz plane. In this case, the entire virtual object 206 is projected onto the projection plane 612, and an image parallel to the xz plane of the virtual object 206 as shown in FIG. 6B is displayed by the display unit 109 in step S311.
[0034]
As described above, in the image display system 100, the user can arbitrarily specify the coordinates of the rotation center point, and an image in which the coordinates of the specified rotation center point are the coordinates of the point of interest is displayed. Therefore, FIG. 5B shows the coordinates of the calculated point calculated by the coordinate calculating means 103 as coordinates of the rotation center point, and FIG. 6 shows the coordinates of the specified point specified by the coordinate specifying means 101 as coordinates of the rotation center point. As can be seen from comparison with (b), by specifying the rotation center point, the virtual object of interest does not exceed the display range of the screen, and the user intended by rotating the coordinates of the viewpoint. An image can be displayed.
[0035]
In addition, the image display system 100 uses either the coordinates of the calculation point 211 calculated by the coordinate calculation unit 103 based on a predetermined rule or the coordinates of the specified point 409 specified by the coordinate specification unit 101 as the rotation center point. The coordinates can be selected and the user can designate the coordinates of the rotation center point only when necessary, so that the user's work can be simplified.
[0036]
Further, the image display system 100 stores the coordinates of the designated point 409 designated by the user in advance in the designated coordinate storage means 102, and instantly stores the coordinates of the designated point 409 stored in the designated coordinate storage means 102 as necessary. Since it can set to the coordinate of a rotation center point, a user's work can be simplified.
[0037]
(Second Embodiment)
First, the configuration of the image display system according to the second embodiment will be described.
[0038]
In addition, about the structure similar to the structure of the image display system which concerns on 1st Embodiment among the structures of the image display system which concerns on this Embodiment, it is the structure of the image display system which concerns on 1st Embodiment. The same reference numerals are assigned and detailed description is omitted.
[0039]
As shown in FIG. 7, when the virtual object is a three-dimensional solid model, the image display system 700 according to the present embodiment designates the virtual object 801 as a shell as shown in FIG. 802, a ridge line 803 and a vertex 804, shell phase element designating means 701 for designating phase elements of the virtual object, coordinates of the center of gravity of the virtual object 801 designated by the shell phase element designating means 701, coordinates of the origin of the work plane 802 A center point coordinate calculating unit 703 for calculating the coordinates of the midpoint of the ridge line 803 and the coordinates of the vertex 804 as the coordinates of the rotation center point, and a center point for storing the coordinates of the rotation center point calculated by the center point coordinate calculating unit 703 Coordinate storage means 704.
[0040]
Next, the operation of the image display system 700 will be described based on the flowchart of FIG. 9 showing the operation of the image display system 700 according to the present embodiment.
[0041]
First, as shown in FIG. 9, the virtual phase 801 shown in FIG. 8 is designated as a shell by the shell phase element designation unit 701, or the phase element of the virtual object 801 is designated (S901).
[0042]
Next, it is determined whether or not the virtual object 801 is specified as a shell by the shell phase element specifying means 701 (S902), and when it is determined that the virtual object 801 is specified as a shell, the virtual object 801 specified as a shell The center point coordinate is calculated by the center point coordinate calculation means 703 as the coordinate of the rotation center point (S903).
[0043]
If it is determined in step S902 that the virtual object 801 is not specified as a shell, it is determined that a phase element is specified, and it is determined whether or not the specified phase element is a work plane 802 (S904). ).
[0044]
Next, when it is determined in step S904 that the designated phase element is the work plane 802, the coordinates of the origin of the designated work plane 802 are calculated by the center point coordinate calculation means 703 as the coordinates of the rotation center point ( S905).
[0045]
If it is determined in step S904 that the specified phase element is not the work plane 802, it is determined whether or not the specified phase element is a ridge line 803 (S906).
[0046]
Next, when it is determined in step S906 that the designated phase element is the ridge line 803, the coordinates of the midpoint of the designated ridge line 803 are calculated by the center point coordinate calculation unit 703 as the coordinates of the rotation center point ( S907).
[0047]
If it is determined in step S906 that the specified phase element is not the ridge line 803, the specified phase element is determined to be the vertex 804, and the coordinates of the specified vertex 804 are the center point as the coordinates of the rotation center point. It is calculated by the coordinate calculation means 703 (S908).
[0048]
Subsequently, the coordinates of the rotation center point calculated by the center point coordinate calculation unit 703 are stored by the center point coordinate storage unit 704 (S909).
[0049]
Next, rotation amounts in the x-axis direction, y-axis direction, and z-axis direction are input to the image generation unit 707 by the rotation input unit 106 (S910).
[0050]
Next, the coordinates of the rotation center point stored in the center point coordinate storage unit 704 are acquired by the image generation unit 707, and the coordinates of the new viewpoint are calculated from the acquired coordinates of the rotation center point and the rotation amount input to the image generation unit 707. Is calculated by the image generation means 107 (S911).
[0051]
Subsequently, in step S909, the coordinates of the rotation center point stored in the center point coordinate storage unit 704 are regarded as the coordinates of the gazing point by the image generation unit 107, and the coordinates of the gazing point are changed from the coordinates of the viewpoint calculated in step S911. An image projected on the projection plane orthogonal to the straight line to be generated is generated by the image generation means 107 (S912).
[0052]
Next, the image generated in step S912 is output from the image generation unit 107 to the display unit 109, and the output image is displayed by the display unit 109 (S913).
[0053]
As described above, the image display system 700 uses the coordinates of the rotation center point as the coordinates of the origin of the work plane 802 to which the virtual object 801 focused as shown in FIG. Therefore, it is possible to display an image centered on the phase element to be focused on.
[0054]
Further, the image display system 700 can specify the coordinates of the center of gravity as the center of the focused virtual object 801 as the coordinates of the rotation center point only by designating the focused virtual object 801 as a shell in the three-dimensional solid model. Therefore, an image in which the focused virtual object 801 is located at the center of the screen can be generated, and an image intended by the user can be displayed.
[0055]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an image display system capable of displaying an image intended by a user.
[Brief description of the drawings]
FIG. 1 is a block diagram of an image display system according to a first embodiment of the present invention. FIG. 2 is a three-dimensional diagram showing virtual objects and calculation points in a virtual space consisting of an x-axis, a y-axis, and a z-axis. 3 is a flowchart of the first embodiment of the present invention. FIG. 4 is a three-dimensional diagram representing a virtual object and a specified point in a virtual space consisting of an x-axis, a y-axis, and a z-axis. FIG. FIG. 4B shows the position of the projection plane after the rotational movement of the coordinates of the viewpoint when the coordinates of the rotation center are the coordinates of the rotation center point. FIG. 5B is projected onto the projection plane when the coordinates of the calculation points are the coordinates of the rotation center point. FIG. 6A is a diagram showing the position of the projection plane after rotational movement of the coordinates of the viewpoint when the coordinates of the designated point are the coordinates of the rotation center point. FIG. 6B is the coordinates of the designated point. Image diagram representing a virtual object projected on the projection plane when the coordinates of the rotation center point are used 7 is a block diagram of an image display system according to a second embodiment of the present invention. FIG. 8 is a diagram showing shells and phase elements when a virtual object is a three-dimensional solid model. Flowchart of embodiment of the present invention [Explanation of symbols]
101 Center point coordinate designation means (coordinate designation means)
102 Designated coordinate storage means 103 Center point coordinate calculation means (coordinate calculation means)
105 Selection means 109 Display means 701 Shell phase element designation means (coordinate designation means)
703 Center point coordinate calculation means (coordinate calculation means)
704 Center point coordinate storage means (designated coordinate storage means)

Claims (4)

Designated coordinate storage means for storing, as a designated point, the midpoint of a perpendicular line drawn from the vertex of the virtual object to the bottom surface ;
Calculated coordinate storage means for storing, as a calculated point, a point where a line of sight passing through the midpoint from the coordinates of the viewpoint intersects the plane;
Selecting means for selecting either the designated point or the coordinates of the calculated point stored as the designated coordinate storage means or the calculated coordinate storage means as the coordinates of the rotation center point;
A rotation amount input means for inputting a rotation amount in the rotational movement of the coordinates of the viewpoint around the coordinates of the rotation center point selected by the selection means;
The coordinates of the new viewpoint are calculated from the coordinates of the rotation center point selected by the selection means and the rotation amount input by the rotation amount input means, and the rotation center point is set as the coordinates of the gazing point. Image generating means for generating an image projected on a projection plane orthogonal to a straight line from the coordinates toward the coordinates of the gazing point;
Display means for displaying an image generated by the image generation means;
An image display device. A designated coordinate storage means for storing a midpoint of a perpendicular line from the vertex of the virtual object to the bottom surface as a designated point, and a calculated coordinate memory for storing a point where a line of sight passing through the midpoint from the coordinates of the viewpoint intersects the plane as a calculated point An image display method for an image display device comprising: means; and display means for displaying an image,
Selecting either the designated point or the coordinates of the calculated point stored by the designated coordinate storage means or the calculated coordinate storage means as the coordinates of the rotation center point;
Inputting a rotation amount in the rotational movement of the coordinates of the viewpoint around the coordinates of the selected rotation center point;
Calculating coordinates of a new viewpoint from the coordinates of the selected rotation center point and the input rotation amount;
Generating an image projected on a projection plane orthogonal to a straight line from the calculated new viewpoint coordinates to the coordinates of the gazing point, with the rotation center point as the gazing point coordinates;
Displaying the generated image on a display means;
The image display method of the image display apparatus characterized by performing. The program for making a computer perform each step in the image display method of the image display apparatus of Claim 2. A computer-readable recording medium on which the program according to claim 3 is recorded.

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